This study is being done for two reasons: 1) to evaluate growth problems in the hip in patients with Slipped Capital Femoral Epiphysis (SCFE) as they continue to grow into adults, and 2) to help doctors determine which patients are at risk for developing a SCFE on their opposite hip. Studies show that up to 60% of patients with a SCFE will go on to develop a SCFE on their other side. Being able to better determine which patients are at risk for developing a SCFE on the other side will help physicians better monitor patients with a history of a SCFE and perhaps treat them before they develop a SCFE on the opposite side. By studying the growth centers seen on X-rays of your child's legs and elbow, the investigators may be able to better predict which children with a SCFE are at risk for developing a SCFE on their opposite hip and potential growth problems as they continue to grow.